Culture and upbringing matter more than anything.
Do you have a link or reference to research on this?
Here's a link to and excerpt from an article on psychopathy and criminal behavior. It doesn't mention culture or upbringing
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Understanding Psychopathic Criminals
Psychopathy is highly correlated with criminal behavior and violence. In
Psychopathy: An Important Forensic Concept for the 21st Century, the powerful connection between psychopathy and
crime was well articulated Dr. Paul Babiak and his colleagues. The seminal 2012 FBI report states that 15-20 percent of the two million+ prisoners in the U.S., which are 90 percent male, are psychopaths (1).
This is not surprising. Egocentrism and the need for power and control of a psychopath are the perfect character traits for a lifetime of antisocial, deviant or criminal activity. However, the relative ease with which a psychopath can participate effectively in crime and violence is very significant for the public and the criminal justice system.
Psychopaths are unabashed in their actions against others, whether it is defrauding someone of their life savings, manipulating law enforcement personnel during an interrogation or blaming their victims for their crimes. This is particularly true in cases involving psychopathic killers. When psychopaths commit a homicide, their killings likely will be planned and purposeful—that is, organized, and not committed in the heat of passion.
The motive of a psychopathic killer will often involve either power and control or sadistic gratification. When faced with overwhelming evidence of their guilt, a psychopathic serial killer such as John Wayne Gacy (the “Killer Clown”) will often claim they lost control or were in a fit of
rage when committing the act of murder. In reality, however, their killings are stone-cold, calculated, and completely premeditated.